CN114166431A

CN114166431A - New energy automobile battery case leakproofness testing platform

Info

Publication number: CN114166431A
Application number: CN202111441997.0A
Authority: CN
Inventors: 施宏达; 吴丹丹
Original assignee: Anhui Hengsheng Lanzhi Technology Co ltd
Current assignee: Anhui Hengsheng Lanzhi Technology Co ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-03-11

Abstract

The invention relates to the technical field of battery box tightness detection, and discloses a new energy automobile battery box tightness detection test bed which comprises a box body, wherein guide rails are fixedly connected to the inner walls of two opposite sides of the box body, one ends of the guide rails are respectively provided with a bending part, a transversely arranged U-shaped frame is arranged between the two guide rails, two idler wheels are connected in the guide rails in a sliding mode, the two idler wheels are respectively rotatably connected with one side of the U-shaped frame through a support shaft, a carrying platform is hinged to one end of the U-shaped frame through two hinges, one end of the carrying platform is connected with a fixing mechanism, a transmission mechanism is connected to the inner wall of the lower end of the box body, the transmission mechanism is connected with the lower end of the carrying platform, one end of the box body is fixedly connected with an exhaust pipe through a round hole, and the other end of the box body is fixedly connected with a rectangular rubber pipe through a rectangular opening. This new energy automobile battery case leakproofness test bench can observe the leakage point when examining fast, also need not to install more pipe fitting simultaneously, has improved detection speed.

Description

New energy automobile battery case leakproofness testing platform

Technical Field

The invention relates to the technical field of battery box tightness detection, in particular to a new energy automobile battery box tightness detection test bed.

Background

Along with the development of electric vehicles, a power battery pack is used as a core component of a pure electric vehicle, the safety of the battery pack is gradually highlighted, the safety of the whole vehicle is directly influenced, various factors need to be fully considered in the development of the battery pack, advanced technical experiences at home and abroad need to be learned and absorbed, and a design scheme is repeatedly verified and optimized, so that the design requirements on the strength, rigidity, heat dissipation, water resistance, insulation and the like of a battery box body are high, the design and the sealing performance test of the battery box body are very important, a small-sized pure electric vehicle becomes one of main driving models of national industrialization strategies, a battery box is usually assembled at the floor of the vehicle, the shape of the battery box body is rectangular, but the surface of the battery box body needs to be made into various shapes through welding or punching, so the sealing test of the battery box body is particularly important and is used for a test bed for detecting the sealing performance of a battery box of a new energy vehicle, irrigation, inflation or air extraction are mostly adopted for detection.

At present, the test bench of current test leakproofness although can detect new energy automobile battery case leakproofness, but the discovery leak point of not being convenient for after detecting, need install more pipe fitting when detecting moreover, consequently detect the time spent longer, speed is slower.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a new energy automobile battery box tightness detection test bed which has the advantages of short detection time, high detection speed, capability of quickly observing leakage points during detection, no need of installing more pipe fittings and the like, and solves the problems that the detection time is long and the speed is slow because the leakage points are not conveniently found after detection and more pipe fittings need to be installed during detection.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: a new energy automobile battery box tightness detection test bed comprises a box body, wherein guide rails are fixedly connected to the inner walls of two opposite sides of the box body, and one end of each guide rail is provided with a bending part, a U-shaped frame which is transversely arranged is arranged between the two guide rails, two rollers are connected in the guide rail in a sliding way, both the rollers are rotationally connected with one side of the U-shaped frame through a supporting shaft, one end of the U-shaped frame is hinged with a carrying platform through two hinges, one end of the carrying platform is connected with a fixing mechanism, the inner wall of the lower end of the box body is connected with a transmission mechanism, the transmission mechanism is connected with the lower end of the carrier, one end of the box body is fixedly connected with an exhaust pipe through a round hole, the other end of the box body is fixedly connected with a rectangular rubber pipe through a rectangular opening, the upper end of the box body is provided with an opening, and the opening part is connected with a sealing plate through a lock catch, and the upper end of the sealing plate is fixedly connected with a barometer.

Preferably, the fixing mechanism comprises two rectangular tubes, the two rectangular tubes are symmetrically and fixedly connected at one end of the carrier, the upper end of the carrying platform is provided with a pressure lever, the lever wall of the pressure lever is symmetrically and fixedly connected with two rectangular levers which are respectively sleeved with two rectangular pipes in a sliding way, a plurality of cross rods which are uniformly distributed are fixedly connected on the rod wall of the pressure rod, one end of the carrying platform is fixedly connected with a supporting frame, the side wall of the supporting frame is fixedly connected with a motor, the output end of the motor is fixedly connected with a worm, the support frame is fixedly connected with a support rod, the center of the rod wall of the support rod is rotatably connected with a screw rod through a rolling bearing, the worm wheel is fixedly connected to the rod wall of the screw rod and meshed with the worm, the rod wall of the screw rod is in threaded connection with a threaded sleeve, and the threaded sleeve is fixedly connected with the center of the rod wall of the pressing rod.

Preferably, a pressing plate is arranged at the upper end of the carrying platform, a plurality of T-shaped sliding grooves which are uniformly distributed are formed in the upper end of the pressing plate, T-shaped sliding blocks are connected in the T-shaped sliding grooves in a sliding mode, the T-shaped sliding blocks are fixedly connected with the rod wall of the cross rod, a partition plate is fixedly connected to the upper end of the carrying platform, and one side of the partition plate is fixedly connected with the tube walls of the two rectangular tubes respectively.

Preferably, the two opposite ends of the pressing plate are rotatably connected with brake rods through pin shafts, the two brake rods are obliquely arranged, and one ends, far away from the pressing plate, of the brake rods are rotatably connected with the pipe wall of the rectangular pipe through connecting shafts.

Preferably, drive mechanism includes two guide bars, two the lower extreme inner wall fixed connection of connecting block and box is all passed through at the both ends of guide bar, the sliding sleeve has been cup jointed in the slip on the pole wall of guide bar, the upper end fixedly connected with driving plate of sliding sleeve, the upper end of driving plate is rotated through the pivot and is connected with two transfer lines, two the one end that the driving plate was kept away from to the transfer line is all rotated through the lower extreme of rotation axis and microscope carrier and is connected, the lower extreme inner wall of box rotates through the pivot and is connected with and pushes away the material cylinder, the lower extreme that the piston rod one end that pushes away the material cylinder passes through the pin and is rotated with the driving plate is connected.

Preferably, one side of the U-shaped frame opposite to the two parallel parts is fixedly connected with a limiting strip, the lower end of the carrier is fixedly connected with a limiting block of an L-shaped structure, the horizontal part of the limiting block is positioned below the limiting strip, one side of the U-shaped frame is fixedly connected with a positioning block, and the positioning block is in contact with the lower end of the carrier.

Preferably, the lower end of the sealing plate is fixedly connected with a rectangular frame, the side wall of the rectangular frame is sleeved with a sealing ring, and the sealing ring is fixedly connected with the side wall of the sealing plate.

(III) advantageous effects

Compared with the prior art, the invention provides a new energy automobile battery box tightness detection test bed which has the following beneficial effects:

1. when the invention is used, a box body and an upper cover of a battery box are fixed by adopting a standard process and then are placed on a carrying platform, then a sealing plate is installed by utilizing a lock catch, after one end of the battery box is contacted with a fixing mechanism, the fixing mechanism is started to fix the battery box, then a transmission mechanism is started to drive the battery box on the carrying platform to be contacted with a rectangular rubber pipe on a box body, the rectangular rubber pipe is extruded and deformed to realize the sealing connection between a threading hole on the battery box and the box body, then an external smoke device is connected with the rectangular rubber pipe, finally an exhaust pipe is connected by utilizing an evacuation device to evacuate the box body, the air pressure in the box body is displayed on an air pressure gauge after evacuation is vertical, the evacuation is stopped after reaching a preset value, as the threading hole on the battery box is communicated with the outside of the box body through the rectangular rubber pipe, at the moment, no smoke is exhausted from the surface of the battery box on the carrying platform can be observed through the box body, if smoke is discharged, the sealing performance of the battery box is unqualified, and a leakage point can be determined by observing the position where the smoke is discharged, so that the use by technicians is facilitated.

2. When the battery box is used, after the battery box is contacted with the partition plate, the motor is started to drive the worm to rotate the worm wheel, the worm wheel rotates to drive the screw rod to rotate in the threaded sleeve, the threaded sleeve is stressed to drive the pressing rod to move downwards, the pressing rod moves downwards when moving downwards, the cross rod moves downwards when moving downwards to press the battery box, one end of the pressing rod swings around the connecting shaft when the pressing plate moves downwards, the pressing plate is pushed to slide the T-shaped sliding block in the T-shaped sliding groove when the pressing rod swings, the pressing plate can stretch relatively, the pressing position gradually leans against the central point of the battery box, and the stability of pressing and fixing is improved.

3. When the device is used, the material pushing cylinder is started to drive the transmission plate to enable the transmission rod to pull the carrying platform to move, the battery box is driven to be in contact with the edge of the pipe orifice of the rectangular rubber pipe when the carrying platform moves, the threading hole of the battery box can be quickly connected with external smoke equipment, after the detection is finished, the external smoke equipment is closed, the material pushing cylinder resets to pull the transmission plate to move, the transmission plate moves to pull the transmission rod and enable the carrying platform to move, the carrying platform moves to enable the battery box to be separated from the rectangular rubber pipe, external air quickly enters the box body through the rectangular rubber pipe to realize pressure relief, the sealing plate is convenient to open, when the carrying platform is pulled to move by the material pushing cylinder, the carrying platform pulls the U-shaped frame to move through the hinge, when the U-shaped frame moves, the two rollers are driven to move in the guide rail, when one of the rollers enters the bent part on the guide rail, because two rollers on the same side of the U-shaped frame are not on the same horizontal plane, the U-shaped frame inclines, when the pushing cylinder continues to reset, the pushing cylinder drives the transmission plate to enable the transmission rod to move, the transmission rod moves to push the carrying platform to incline around the hinge, the inclination angle of the carrying platform is larger than that of the U-shaped frame, so that a technician can conveniently take and place the battery box from the carrying platform, and the detection speed is improved.

Drawings

Fig. 1 is a schematic structural diagram of a battery box tightness detection test bed for a new energy vehicle according to the present invention;

fig. 2 is a schematic view of an internal structure of a box body in fig. 1 of a new energy vehicle battery box tightness detection test bed provided by the invention;

fig. 3 is a schematic structural diagram of a U-shaped frame, a carrying platform and a fixing mechanism in fig. 2 of the new energy vehicle battery box tightness detection test bed provided by the invention;

fig. 4 is a schematic structural diagram of a new energy vehicle battery box tightness detection test bed according to the present invention, wherein the fixing mechanism in fig. 2 is a fixing mechanism;

FIG. 5 is a schematic structural diagram of a cross bar and a pressing plate in FIG. 4 of the test bed for testing the sealing performance of the battery box of the new energy automobile, which is provided by the invention;

fig. 6 is an enlarged view of a structure at a position a in fig. 5 of the new energy vehicle battery box tightness detection test bed provided by the invention;

fig. 7 is a schematic structural view of a U-shaped frame and a guide rail in fig. 2 of a new energy vehicle battery box tightness detection test bed provided by the invention;

fig. 8 is a schematic structural diagram of a battery box tightness detection test bed of a new energy vehicle according to the present invention, wherein the transmission mechanism in fig. 2 is a transmission mechanism;

fig. 9 is an expanded effect diagram of a battery box tightness detection test bed of a new energy automobile provided by the invention, shown in fig. 3;

fig. 10 is a top view of the box body in fig. 1 of a new energy automobile battery box tightness detection test bed provided by the invention;

in the figure: 1. a box body; 2. a seal ring; 3. a sealing plate; 4. a barometer; 5. an exhaust pipe; 6. a guide rail; 7. a stage; 8. a brake lever; 9. a rectangular rubber tube; 10. a rectangular frame; 11. a U-shaped frame; 12. pressing a plate; 13. a cross bar; 14. a material pushing cylinder; 15. a roller; 16. a pressure lever; 17. a rectangular bar; 18. a rectangular tube; 19. a partition plate; 20. a screw rod; 21. a worm gear; 22. a support frame; 23. a motor; 24. a limiting block; 25. a threaded bushing; 26. a worm; 27. a support bar; 28. a T-shaped slider; 29. a T-shaped chute; 30. a limiting strip; 31. a drive plate; 32. a transmission rod; 33. a sliding sleeve; 34. a guide bar; 35. positioning blocks; .

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1:

referring to fig. 1-10, a new energy automobile battery box tightness detection test bed comprises a box body 1, the box body 1 is made of organic glass, two opposite inner side walls of the box body 1 are fixedly connected with guide rails 6, one end of each guide rail 6 is provided with a bending part, a transversely arranged U-shaped frame 11 is arranged between the two guide rails 6, the guide rails 6 are connected with two rollers 15 in a sliding manner, the two rollers 15 are rotatably connected with one side of the U-shaped frame 11 through support shafts, one end of the U-shaped frame 11 is hinged with a carrying platform 7 through two hinges, one opposite side of two parallel parts of the U-shaped frame 11 is fixedly connected with a limit strip 30, the lower end of the carrying platform 7 is fixedly connected with a limit block 24 with an L-shaped structure, the horizontal part of the limit block 24 is positioned below the limit strip 30, one side of the U-shaped frame 11 is fixedly connected with a locating block 35, the locating block 35 is in contact with the lower end of the carrying platform 7, one end of the carrying platform 7 is connected with a fixing mechanism, the lower extreme inner wall connection of box 1 has drive mechanism, drive mechanism is connected with the lower extreme of microscope carrier 7, round hole fixedly connected with blast pipe 5 is passed through to the one end of box 1, the other end of box 1 passes through rectangle opening fixedly connected with rectangle rubber tube 9, the upper end of box 1 is equipped with the opening, and the opening part is connected with closing plate 3 through the hasp, the lower extreme fixedly connected with rectangle frame 10 of closing plate 3, sealing washer 2 has been cup jointed to the lateral wall of rectangle frame 10, the lateral wall fixed connection of sealing washer 2 and closing plate 3, the upper end fixedly connected with barometer 4 of closing plate 3.

When the invention is used, a box body and an upper cover of a battery box (not shown in the figure) are fixed by adopting a standard process and then are placed on a carrying platform 7, then a sealing plate 3 is installed by utilizing a lock catch, after one end of the battery box is contacted with a fixing mechanism, the fixing mechanism is started to fix the battery box, then a transmission mechanism is started to drive the battery box on the carrying platform 7 to be contacted with a rectangular rubber pipe 9 on a box body 1, the rectangular rubber pipe 9 is extruded and deformed to realize the sealing connection between a threading hole (reserved on the battery box) on the battery box and the box body 1, then an external smoke device (not shown in the figure) is connected with the rectangular rubber pipe 9, finally an exhaust pipe 5 is connected by utilizing an evacuation device (not shown in the figure) to evacuate the box body 1, after evacuation, the air pressure in the box body 1 is displayed on an air pressure gauge 4 to be vertical, and evacuation is stopped after a preset value is reached, because the through wires hole on the battery case sees through rectangle rubber tube 9 and box 1 outside intercommunication, and there is the flue gas to discharge on the box surface of the battery case on the microscope carrier 7 is observed to permeable box 1 this moment, if have the smog to discharge then to explain that the battery case leakproofness is unqualified, and the accessible is observed the smog exhaust position and is confirmed the leak point, makes things convenient for the technical staff to use.

Example 2: the difference is based on example 1;

referring to fig. 2-6, the fixing mechanism includes two rectangular tubes 18, the two rectangular tubes 18 are symmetrically and fixedly connected to one end of the carrier 7, a press rod 16 is disposed at the upper end of the carrier 7, two rectangular rods 17 are symmetrically and fixedly connected to a rod wall of the press rod 16, the two rectangular rods 17 are respectively slidably sleeved with the two rectangular tubes 18, a plurality of uniformly distributed cross rods 13 are fixedly connected to the rod wall of the press rod 16, a support frame 22 is fixedly connected to one end of the carrier 7, a motor 23 is fixedly connected to a side wall of the support frame 22, a worm 26 is fixedly connected to an output end of the motor 23, a support rod 27 is fixedly connected to the support frame 22, a lead screw 20 is rotatably connected to a center of the rod wall of the support rod 27 through a rolling bearing, a worm wheel 21 is fixedly connected to the rod wall of the lead screw 20, the worm wheel 21 is engaged with the worm 26, a threaded sleeve 25 is threadedly connected to the rod wall of the lead screw 20, the threaded sleeve 25 is fixedly connected to the center of the rod wall of the press rod 16, the upper end of microscope carrier 7 is equipped with clamp plate 12, a plurality of evenly distributed's T type spout 29 has been seted up to the upper end of clamp plate 12, equal sliding connection has T type slider 28 in a plurality of T type spouts 29, the pole wall fixed connection of T type slider 28 and horizontal pole 13, the upper end fixedly connected with baffle 19 of microscope carrier 7, one side of baffle 19 respectively with the pipe wall fixed connection of two rectangular tubes 18, the both ends that clamp plate 12 is relative all are connected with brake lever 8 through the round pin hub rotation, two brake levers 8 are the slope setting, the pipe wall rotation of connecting axle and rectangular tube 18 is passed through to the one end that clamp plate 12 was kept away from to brake lever 8 is connected.

When the fixing mechanism is arranged, after a battery box is contacted with a partition plate 19, a motor 23 is started to drive a worm 26 to enable a worm wheel 21 to rotate, the worm wheel 21 rotates to drive a screw rod 20 to rotate in a threaded sleeve 25, the threaded sleeve 25 is forced to drive a pressure rod 16 to move downwards, the pressure rod 16 drives a cross rod 13 to move downwards when moving downwards, the cross rod 13 drives a pressure plate 12 to move downwards to press the battery box when moving downwards, one end of a brake rod 8 swings around a connecting shaft when the pressure plate 12 moves downwards, the brake rod 8 pushes the pressure plate 12 to enable a T-shaped sliding block 28 to slide in a T-shaped sliding groove 29 when swinging, and the pressure plate 12 can relatively stretch and contract, so that the pressed position gradually leans against the central point of the battery box, and the stability of pressing and fixing is improved.

Example 3: the difference is based on example 1;

referring to fig. 7-9, the transmission mechanism includes two guide rods 34, two ends of each guide rod 34 are fixedly connected to the inner wall of the lower end of the box body 1 through a connecting block, a sliding sleeve 33 is slidably sleeved on the rod wall of each guide rod 34, a transmission plate 31 is fixedly connected to the upper end of each sliding sleeve 33, two transmission rods 32 are rotatably connected to the upper end of each transmission plate 31 through a rotating shaft, one ends of the two transmission rods 32, which are far away from the transmission plate 31, are rotatably connected to the lower end of the carrier 7 through rotating shafts, the inner wall of the lower end of the box body 1 is rotatably connected to the material pushing cylinder 14 through a shaft pin, and one end of a piston rod of the material pushing cylinder 14 is rotatably connected to the lower end of the transmission plate 31 through a pin.

When the fixing mechanism is used, the material pushing cylinder 14 is started to drive the transmission plate 31 to enable the transmission rod 32 to pull the carrying platform 7 to move, the battery box is driven to be in contact with the edge of the pipe orifice of the rectangular rubber tube 9 when the carrying platform 7 moves, the threading hole of the battery box can be quickly connected with external smoke equipment, after the detection is finished, the external smoke equipment is closed, the material pushing cylinder 14 resets to pull the transmission plate 31 to move, the transmission plate 31 moves to pull the transmission rod 32 and enable the carrying platform 7 to move, the carrying platform 7 moves to enable the battery box to be separated from the rectangular rubber tube 9, external air quickly enters the box body 1 through the rectangular rubber tube 9 to realize pressure relief, the sealing plate 3 is convenient to open, when the carrying platform 7 is pulled to move by the hinge when the material pushing cylinder 14 pulls the carrying platform 7 to move, the U-shaped frame 11 drives the two rollers 15 to move in the guide rail 6 when the U-shaped frame 11 moves, when one of the rollers enters the bending part on the guide rail 6, because the two rollers 15 on the same side of the U-shaped frame 11 are not on the same horizontal plane, the U-shaped frame 11 is inclined, when the pushing cylinder 14 continues to reset, the pushing cylinder 14 drives the transmission plate 31 to move the transmission rod 32, the transmission rod 32 moves to push the carrying platform 7 to incline around the hinge, and at the moment, the inclination angle of the carrying platform 7 is larger than that of the U-shaped frame 11, as shown in fig. 9, the battery box can be conveniently taken and placed on the carrying platform 7 by a technician, and the detection speed is improved.

It is to be noted that the term "comprises," "comprising," or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a new energy automobile battery case leakproofness testing platform, includes box (1), its characterized in that: the inner walls of two opposite sides of the box body (1) are fixedly connected with guide rails (6), one end of each guide rail (6) is provided with a bending part, a U-shaped frame (11) which is transversely arranged is arranged between the two guide rails (6), the guide rails (6) are connected with two idler wheels (15) in a sliding way, the two idler wheels (15) are rotatably connected with one side of the U-shaped frame (11) through support shafts, one end of the U-shaped frame (11) is hinged with a carrying platform (7) through two hinges, one end of the carrying platform (7) is connected with a fixing mechanism, the inner wall of the lower end of the box body (1) is connected with a transmission mechanism, the transmission mechanism is connected with the lower end of the carrying platform (7), one end of the box body (1) is fixedly connected with an exhaust pipe (5) through a round hole, and the other end of the box body (1) is fixedly connected with a rectangular rubber pipe (9) through a rectangular opening, the upper end of box (1) is equipped with the opening, and the opening part is connected with closing plate (3) through the hasp, the upper end fixedly connected with barometer (4) of closing plate (3).

2. The new energy automobile battery case tightness detection test bed according to claim 1, characterized in that: the fixing mechanism comprises two rectangular tubes (18), the two rectangular tubes (18) are symmetrically and fixedly connected to one end of a carrier (7), a pressure rod (16) is arranged at the upper end of the carrier (7), two rectangular rods (17) are symmetrically and fixedly connected to the rod wall of the pressure rod (16), the two rectangular rods (17) are respectively in sliding sleeve joint with the two rectangular tubes (18), a plurality of uniformly distributed cross rods (13) are fixedly connected to the rod wall of the pressure rod (16), a support frame (22) is fixedly connected to one end of the carrier (7), a motor (23) is fixedly connected to the side wall of the support frame (22), a worm (26) is fixedly connected to the output end of the motor (23), a support rod (27) is fixedly connected to the support frame (22), and a lead screw (20) is rotatably connected to the center of the rod wall of the support rod (27) through a rolling bearing, the worm gear (21) is fixedly connected to the rod wall of the screw rod (20), the worm gear (21) is meshed with the worm (26), a threaded sleeve (25) is connected to the rod wall of the screw rod (20) in a threaded mode, and the threaded sleeve (25) is fixedly connected with the center of the rod wall of the pressing rod (16).

3. The new energy automobile battery case tightness detection test bed according to claim 2, characterized in that: the upper end of the carrying platform (7) is provided with a pressing plate (12), the upper end of the pressing plate (12) is provided with a plurality of T-shaped sliding grooves (29) which are uniformly distributed, T-shaped sliding blocks (28) are connected in the T-shaped sliding grooves (29) in a sliding mode, the T-shaped sliding blocks (28) are fixedly connected with the rod wall of the cross rod (13), the upper end of the carrying platform (7) is fixedly connected with a partition plate (19), and one side of the partition plate (19) is fixedly connected with the tube walls of the two rectangular tubes (18) respectively.

4. The new energy automobile battery case tightness detection test bed according to claim 3, characterized in that: the two opposite ends of the pressing plate (12) are rotatably connected with brake levers (8) through pin shafts, the brake levers (8) are obliquely arranged, and one ends, far away from the pressing plate (12), of the brake levers (8) are rotatably connected with the pipe wall of the rectangular pipe (18) through connecting shafts.

5. The new energy automobile battery case tightness detection test bed according to claim 1, characterized in that: the transmission mechanism comprises two guide rods (34), two ends of each guide rod (34) are fixedly connected with the inner wall of the lower end of the box body (1) through connecting blocks, a sliding sleeve (33) is sleeved on the rod wall of each guide rod (34) in a sliding mode, a transmission plate (31) is fixedly connected with the upper end of each sliding sleeve (33), two transmission rods (32) are rotatably connected with the upper end of each transmission plate (31) through a rotating shaft, one end, far away from the transmission plate (31), of each transmission rod (32) is rotatably connected with the lower end of the carrier (7) through a rotating shaft, a material pushing cylinder (14) is rotatably connected with the inner wall of the lower end of the box body (1) through a shaft pin, and one end of a piston rod of the material pushing cylinder (14) is rotatably connected with the lower end of the transmission plate (31) through a pin.

6. The new energy automobile battery case tightness detection test bed according to claim 1, characterized in that: the positioning device is characterized in that limiting strips (30) are fixedly connected to one opposite sides of two parallel parts of the U-shaped frame (11), a limiting block (24) of an L-shaped structure is fixedly connected to the lower end of the carrying platform (7), the horizontal part of the limiting block (24) is located below the limiting strips (30), a positioning block (35) is fixedly connected to one side of the U-shaped frame (11), and the positioning block (35) is in contact with the lower end of the carrying platform (7).

7. The new energy automobile battery case tightness detection test bed according to claim 1, characterized in that: the lower extreme fixedly connected with rectangle frame (10) of closing plate (3), sealing washer (2) have been cup jointed to the lateral wall of rectangle frame (10), sealing washer (2) and the lateral wall fixed connection of closing plate (3).